Inspection Procedure

NOTE: The vehicle is equipped with an SRS (Supplemental Restraint System) such as airbags. Before servicing (including removal or installation of parts), be sure to read the precautionary notice for the Supplemental Restraint System (See PRECAUTION ).

INSPECT RADIO RECEIVER

Disconnect the radio receiver connector E15.

Fig 1: Disconnecting Radio Receiver Connector E15
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

STANDARD RESISTANCE SPECIFIED CONDITION

Tester connection	Condition	Specified condition
2CH - GND	No switch is pushed	Approx. 100 k
2CH - GND	VOICE switch: push	Approx. 3.2 k

NG: Go to step 2

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

INSPECT STEERING PAD SWITCH ASSEMBLY

Disconnect the steering pad switch assembly connector A.

Fig 2: Disconnecting Steering Pad Switch Assembly Connector A
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

STANDARD RESISTANCE SPECIFIED CONDITION

Tester connection	Condition	Specified condition
AU2 - EAU	No switch is pushed	Approx. 100 k
AU2 - EAU	VOICE switch: push	Approx. 3.2 k

NG: REPLACE STEERING PAD SWITCH ASSEMBLY

OK: GO TO NEXT STEP

INSPECT SPIRAL CABLE

Disconnect the spiral cable connectors.

Fig 3: Identifying Steering Pad Switch Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
EAU - EAU	Always	Below 1
AU2 - AU2	Always	Below 1

NG: REPLACE SPIRAL CABLE

OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE - RADIO RECEIVER)